EDIT 2: On the back of the card I found a WHITE TEXT list showing R16 & R 17 in an outlined box with an upper case "A" listed perhaps as a resistor group location map ( no idea yet ) but after checking both sides ( with fan removed ) still can't find R 17. I have no idea what the WHITE TEXT signifies .. I'll Google for info but any advice very welcome.

I just discovered that my R9 270X is showing bootscreen on the Display port to HDMI adaptor ! I expected that DVI to DVI would be the bootscreen. Live & learn. I bought the DP to HDMI adaptor two years ago on a whim .. I'm glad I kept it now.EDIT : DP - DP to HDMI adaptor - HDMI Bootscreen OK if only ONE monitor connected. Same with DVI - DVI ifonly one monitor connected.

I live in Japan, a bit north of Osaka. Everyone knows Akihabara but not so many know "Den Den Town" in Osaka.

I made the trip down to Den Den town today in sweltering heat & humiidy and found probably the only HD 7950 available.

It was a HIS HD 7950 in mint condition Got it for ¥8,800 before sales tax 8%.

This HIS has a single fan and 2 X 6 pin power ( Great ! ) it appears so far to be reference but I think the PCB has a quite different layout to the AMD fererence release - I'll confirm this later.

Booted into Win 7 / 32bit on a dedicated HDD ( don't like Bootcamp ) with the HIS in slot one on my cMP 4,1 flashed to 5,1 with an EFI flashed XFX 5770 in slot 4.

Looked at bios's in both 1 & 2 bios switch positions and knew that they are identical. Decided that position 2's bios would be flashed.

OOTB the folllowing showed video ( after bootup ) in Mavericks 10.9.5

1. DVI -DVI

2. HDMI - HDMI

3. mDP - adaptor - DVI.

That bios switch is a wonderful thing to have on a GPU if one is not often booting from other HDD installations.

========================================

Flashed the HIS and get efI boot on . . . .

1. DVI - DVI

2. mDP - adaptor - DVI

With two monitors connected the efi boot happened on the mDP - adaptor - DVI connection. That surprised me.

The HIS fans really rev up until just after booting to Mavericks but then basically . .inaudible . .nice !

===============================================

This is the 6th. Radeon card that I have flashed. I've come a long way with so much good advice and encouragement from many people here. You all know who you are. Please accept my heartfelt gratitude for making me more self sufficient and just a little more confident & proficient.

Mike.

PS : Does anyone else have this particular HIS 7950 ? If so . . is there an R17 resistor ? ( I'm too tired to look at the moment ).

I had this card, the only difference is that they rename the card to R9 280. But exactly the same thing anyway. This is a very nice card. One of the best 7950. Super quiet, very good cooling, especially good for cMP because using the blower design, and dual 6pin. In fact, for stock clock speed, you can easily downvolt it to 0.956V or even lower. But generally 0.956V is better than lower. Because that's the high demand 2D voltage. If set anything lower than that. Afterburner (in Windows) will unable to adjust the card's voltage. However, in Mac OS, my test shows the card can run stabily as low as 0.888V. Which make the card draw much less power, and stay cool.

I live in Japan, a bit north of Osaka. Everyone knows Akihabara but not so many know "Den Den Town" in Osaka.

I made the trip down to Den Den town today in sweltering heat & humiidy and found probably the only HD 7950 available.

It was a HIS HD 7950 in mint condition Got it for ¥8,800 before sales tax 8%.

This HIS has a single fan and 2 X 6 pin power ( Great ! ) it appears so far to be reference but I think the PCB has a quite different layout to the AMD fererence release - I'll confirm this later.

Booted into Win 7 / 32bit on a dedicated HDD ( don't like Bootcamp ) with the HIS in slot one on my cMP 4,1 flashed to 5,1 with an EFI flashed XFX 5770 in slot 4.

Looked at bios's in both 1 & 2 bios switch positions and knew that they are identical. Decided that position 2's bios would be flashed.

OOTB the folllowing showed video ( after bootup ) in Mavericks 10.9.5

1. DVI -DVI

2. HDMI - HDMI

3. mDP - adaptor - DVI.

That bios switch is a wonderful thing to have on a GPU if one is not often booting from other HDD installations.

========================================

Flashed the HIS and get efI boot on . . . .

1. DVI - DVI

2. mDP - adaptor - DVI

With two monitors connected the efi boot happened on the mDP - adaptor - DVI connection. That surprised me.

The HIS fans really rev up until just after booting to Mavericks but then basically . .inaudible . .nice !

===============================================

This is the 6th. Radeon card that I have flashed. I've come a long way with so much good advice and encouragement from many people here. You all know who you are. Please accept my heartfelt gratitude for making me more self sufficient and just a little more confident & proficient.

Mike.

PS : Does anyone else have this particular HIS 7950 ? If so . . is there an R17 resistor ? ( I'm too tired to look at the moment ).

Tonight I ran X-Plane 10 around YSSY ( Sydney ) on the HD 7950. Definitely got higher framerates with everythng turned up and there were none of the usual pauses as different parts of the scenery loaded. My SSD drive helps too.

Hi all well I got a great deal on a couple for Pitcairn XT & Tahiti cards FirePro S9000 and Radeon Sky 500. Both only have one DisplayPort so need a little help with editing EFI to use the one DisplayPort since it flashed fine, but alas just won't show boot screen. Any help would be greatly appreciated. I want to edit the rom myself so I learn how to so just guide me where to look. Although I might be back for help. =D